166264740 has 36 divisors (see below), whose sum is σ = 504336924. Its totient is φ = 44337216.

The previous prime is 166264729. The next prime is 166264751. The reversal of 166264740 is 47462661.

166264740 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 647 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (166264729) and next prime (166264751).

It can be written as a sum of positive squares in 2 ways, for example, as 121749156 + 44515584 = 11034^2 + 6672^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 166264695 and 166264704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461667 + ... + 462026.

It is an arithmetic number, because the mean of its divisors is an integer number (14009359).

Almost surely, 2^166264740 is an apocalyptic number.

166264740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166264740 is an abundant number, since it is smaller than the sum of its proper divisors (338072184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166264740 is a wasteful number, since it uses less digits than its factorization.

166264740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923708 (or 923703 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 166264740 is about 12894.3685382418. The cubic root of 166264740 is about 549.8784745277.

The spelling of 166264740 in words is "one hundred sixty-six million, two hundred sixty-four thousand, seven hundred forty".